Mention the reason why aquatic plants have air filled tissues.​

Answer:

exert no attractive forces on each other, or on the walls of the container

Explanation:

The amount of Iron-59 will be left after 89.0 days have passed, starting with 61.2 milligrams is 15.3 mg.

To calculate this, first determine the number of half-lives that have passed. Divide the total time (89.0 days) by the half-life (44.5 days):

89.0 days / 44.5 days = 2 half-lives

Now, apply the half-life formula:

Final amount = Initial amount × (1/2)^number of half-lives

Final amount = 61.2 mg × (1/2)²

Final amount = 61.2 mg × (1/4)

Final amount = 15.3 mg

After 89.0 days have passed, you will have 15.3 milligrams of Iron-59 left.

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Answer:

36.55 J

Explanation:

PE = Potential energy

KE = Kinetic energy

TE = Total energy

The following data were obtained from the question:

Position >> PE >>>>> KE >>>>>> TE

1 >>>>>>>> 72.26 >> 27.74 >>>> 100

2 >>>>>>>> 63.45 >> x >>>>>>>> 100

3 >>>>>>>> 58.09 >> 41.91 >>>>> 100

The kinetic energy of the pendulum at position 2 can be obtained as follow:

From the table above, at position 2,

Potential energy (PE) = 63.45 J

Kinetic energy (KE) = unknown = x

Total energy (TE) = 100 J

TE = PE + KE

100 = 63.45 + x

Collect like terms

100 – 63.45 = x

x = 36.55 J

Thus, the kinetic energy of the pendulum at position 2 is 36.55 J.

Hydrolysis occurs when Fe2O3 is dissolved in water, resulting in the formation of Fe(OH)3 and H+ ions. For every Fe in Fe2O3, there are 1.5 O. Thus, the iron content of Fe2O3 is reduced.

Water in the liquid state serves as the solvent in an aqueous solution. In other words, water molecules surround and integrate solute (dissolved) ions and molecules into their web of bonds. Following that, the dissolved species dispersed all over the water.

Aqueous solutions are made up of water and one or more dissolved materials. Solids, gases, or other liquids can all dissolve in an aqueous solution.

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Question:

How Many Particles Fe2O3 Will Produce In An Aqueous Solution (In Water).

Mg + HCl  → MgCl2 + H2. Salt and hydrogen gas are created when metal and acid combine. Magnesium produces hydrogen gas.

Thus, Salt and hydrogen gas are created when metal and acid combine. Magnesium produces hydrogen gas and magnesium chloride salt when it combines with diluted hydrochloric acid.

The gas produced by the reaction of magnesium with diluted HCl is hydrogen gas. The gas produced by the reaction of magnesium with diluted HCl is hydrogen gas.

The experiment produces very flammable hydrogen gas. No ignition source should be available to students.

Thus, Mg + HCl  → MgCl2 + H2. Salt and hydrogen gas are created when metal and acid combine. Magnesium produces hydrogen gas.

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Answer:

Group B is the control group

Explanation:

In an experiment, a control group is the standard to which comparisons are made in an experiment.

Answer:

The particles need energy to overcome the attractions between them. As the liquid gets warmer more particles have sufficient energy to escape from the liquid. Eventually even particles in the middle of the liquid form bubbles of gas in the liquid.

Answer: 12

Explanation:

Answer: electrons

Explanation:

electrons are attracted to the nucleus by the charge of the protons. To get past this force, one would need to add energy. Ionization energy increases to the right and up (according to the periodic table trends) because there are more protons as you move across a period, making it harder to take an electron.

Answer

Iron powder

Explanation

The one with the highest surface area will react with oxygen the fastest.

This is because if the surface area of a reactant is increased; more particles are exposed to the other reactant, and there is a greater chance of particles colliding, which leads to more successful collisions per second. Hence the rate of reaction increases.

The one with the highest surface area is iron powder.

From 6.5g of BaCl2, we can produce 8.98 g of AgCl.

To answer your question, we need to use stoichiometry to determine the amount of AgCl produced from 6.5g of BaCl2.
The balanced chemical equation for the reaction between BaCl2 and AgNO3 (which produces AgCl) is:
BaCl2 + 2AgNO3 → 2AgCl + Ba(NO3)2
From the equation, we can see that 1 mole of BaCl2 reacts with 2 moles of AgNO3 to produce 2 moles of AgCl.
First, we need to convert 6.5g of BaCl2 to moles. The molar mass of BaCl2 is 208.23 g/mol, so:
6.5g BaCl2 x (1 mol BaCl2/208.23g BaCl2) = 0.0312 mol BaCl2
Next, we can use stoichiometry to determine the moles of AgCl produced. Since 1 mole of BaCl2 produces 2 moles of AgCl, we have:
0.0312 mol BaCl2 x (2 mol AgCl/1 mol BaCl2) = 0.0624 mol AgCl
Finally, we can convert moles of AgCl to grams using the molar mass of AgCl, which is 143.32 g/mol:
0.0624 mol AgCl x (143.32 g AgCl/1 mol AgCl) = 8.98 g AgCl

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Answer: Animation: Burning gas makes the air inside the balloon less dense, producing an upward force or lift. 1) A hot air balloon stays on the ground (or descends) when the air inside it is too cool. ... 3) When the air is hotter still, the balloon rises because the lift force is greater than the weight.

Explanation:

Common sense

Answer:

1.92

Explanation:

Answer:

It'd be PBS, PBCI2

Answer:

linear angleee

Explanation:

lol i dont know what to put here

Answer:

B) Bent

There are a lot of types of bents but this one is linear bent.

Answer:

I don’t know what recording station you’re referring to but, When seismic waves reach the seismograph, a graphical record, or seismogram, is produced

Explanation:

The seismic waves hitting the recording station has been resulted in the seismograph, that has been evident of the earthquake.

The seismic wave has been the radiation, with the result of the movement of the earth surface. The movement has been result in the earthquake.

The intensity of the earthquake has been measured by seismograph on the Richter scale. The seismic wave results in the movement of the leads to the production of the seismograph.

The seismic waves hitting the recording station has been resulted in the seismograph, that has been evident of the earthquake.

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1. The complete electron configuration for the chromium atom (Cr, atomic number 24) is: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d⁵

2. Using NOBLE GAS notation, the electron configuration for the zinc atom (Zn, atomic number 30) is: [Ar] 4s² 3d¹⁰

3. The complete electron configuration for the potassium atom (K, atomic number 19) is: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹

4. Using NOBLE GAS notation, the electron configuration for the nitrogen atom (N, atomic number 7) is: [He] 2s² 2p³

5. The complete electron configuration for the vanadium atom (V, atomic number 23) is: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d³

6. Using NOBLE GAS notation, the electron configuration for the scandium atom (Sc, atomic number 21) is: [Ar] 4s² 3d¹

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In the given redox reaction: 5 Fe²⁺(aq) + 8 H⁺(aq) + MnO₄⁻(aq) → Mn²⁺(aq) + 4H₂O(l) + 5 Fe³⁺(aq), the element being reduced is manganese (Mn).

Reduction is the process in which an element gains electrons, decreasing its oxidation state. In this reaction, Mn is part of the MnO₄⁻ ion with an initial oxidation state of +7. It is converted to Mn²⁺ with an oxidation state of +2. This change represents a gain of 5 electrons by Mn, indicating that it is being reduced. Meanwhile, iron (Fe) is being oxidized from Fe²⁺ to Fe³⁺, losing one electron in the process. The H⁺ ions and H₂O molecules participate in balancing the equation but are not undergoing redox changes themselves.

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Answer:

2051.9936 g

Explanation:

Mass = ?

Number of moles = 51.2 mol

The relationship between both quantities is given by the equation;

Number of moles = Mass / Molar mass

Solving for mass;

Mass = Number of moles * Molar mass

Mass = 51.2 * 40.078

Mass = 2051.9936 g

The half-life of the radioactive substance is approximately 333.6 years. To find the half-life of a radioactive substance, we need to know how long it takes for half of the substance to decay. In this case, after one year, 70% of the substance remains, which means that 30% of the substance has decayed.

To find the half-life, we can use the formula:
\(t_{1/2}\)= ㏑(2) / λ

where
\(t_{1/2}\) is the half-life,  ㏑(2) is the natural logarithm of 2 (approximately 0.693), and λ is the decay constant.

We know that after one year, the substance has decayed by 30%, so we can set up an equation:
0.7 = e^(-λ * 1)

Taking the natural logarithm of both sides, we get:
㏑(0.7) = -λ * 1

Solving for λ, we get:
λ = - ㏑(0.7)

Plugging this into the formula for the half-life, we get:

\(t_{1/2}\) = ㏑(2) / (- ㏑(0.7))

Simplifying, we get:

\(t_{1/2}\) = 333.6 years

Therefore, the half-life of the radioactive substance is approximately 333.6 years.

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The 0.118 moles are the mass Iron(III) oxide reacts with carbon monoxide gas to form solid iron metal and carbon dioxide gas: Fe2O3+3CO→2Fe+3CO2.

Limiting and Excess Reactants:There are sorts of reactants which can be utilized in a chemical response process, those are the proscribing reactant and the extra reactant. There is continually a leftover quantity of the extra reactant after a response. The most quantity of merchandise that may be produced relies upon at the proscribing reactant.

First, we convert the loads of the reactants into moles the usage of their molecular weight:

Solving for moles of Fe2O3, nFe2O3,

nFe2O3=mFe2O3MWFe2O3=23.0g159.69gmolnFe2O3=zero.144molesSolving for moles of CO, nCO,nCO=mCOMWCO=15.4g28gmolnCO=zero.55molesIn figuring out the proscribing and extra reactants, we decide the moles required for every reactant if we used all of the given moles adjusted consistent with their mole ratio withinside the balanced response.

The moles ecess reactant =nCO−nCOx=zero.fifty five−zero.432=0.118 molThe mass of the extra reactant left is calculated the usage of its moles and molecular weight,

massexcessreactantleft=mCO×M.

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The decay of Pb by emitting a β− particle results in the production of Bi. β− decay is a process in which an atomic nucleus emits an electron (β− particle) and transforms into a different nucleus.

In the case of Pb, it undergoes β− decay to become Bi. The equation representing this decay process is:

\(\[^{210}\textrm{Pb} \rightarrow \,^{210}\textrm{Bi} + e^{-}\]\)

In this equation, the superscripts represent the mass numbers of the nuclides, while the subscripts represent their atomic numbers. Pb has a mass number of 210, and during the decay process, it emits a β− particle and transforms into Bi, which also has a mass number of 210. The emitted β− particle carries away excess energy and atomic charge to maintain the balance in the decay process.

Overall, when Pb undergoes β− decay, it transforms into Bi by emitting an electron (β− particle). This process helps stabilize the nucleus and leads to the formation of a new nuclide.

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1.3 x 10¹⁵ : 1.2 x 10⁹ = 1.083 x 10⁶

Answer:

1.3x 10 15 gallons of water / 1.2x 10 9 gallons/day=

1.1x 10 6 gallons/day

Explanation:

1) The reaction is exothermic and heat is a product

2) The color would turn to pink.

Let us recall that an endothermic reaction is one in which the increase in the temperature of the system would drive the forward reaction. This implies that the equilibrium would shift to the right when the set up is heated. Since the color of the solution changes to blue when heated hence the reaction is exothermic.

If you removed heat by placing the solution in the ice bath, we can see that we have removed the heat thus we expect that the reverse reaction would take place and the color would change to pink.

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Option 3 accurately represents the essence of an ethogram as an inventory of species-specific behaviors.

An ethogram can be best described as an inventory of the behavior of a particular species. It is a systematic catalog or list of behaviors exhibited by a specific animal species.

An ethogram provides a comprehensive overview of the behaviors displayed by the animals under study, documenting various activities, actions, and patterns of behavior.

While options 1 and 2 are related to visual representations or descriptions of behavior, they do not capture the comprehensive nature of an ethogram. Option 4 refers specifically to behaviors observed in response to an experimental intervention, which is more narrow in scope compared to an ethogram. Therefore, option 3 accurately represents the essence of an ethogram as an inventory of species-specific behaviors.

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The statement that correctly describes the reaction of sulfur dioxide gas in the presence of oxygen and vanadium(V) oxide to form sulfur trioxide is: Vanadium (V) oxide is a catalyst.

The correct option is 4.

A catalyst is a substance that alters the rate of a chemical reaction but which remains chemically unchanged at the end of the chemical reaction.

A catalyst can increase the rate of chemical reactions and it can also decrease the rate of chemical reactions. Catalysts that increase the rate of chemical reactions are called positive catalysts whole catalysts that decrease the rate of chemical reactions are called negative catalysts.

Catalysts alter the rate of chemical reactions by lowering or raising the activation energy of a reaction.

The reaction of sulfur dioxide gas in the presence of oxygen and vanadium(V) oxide to form sulfur trioxide is a catalytic reaction.

In the reaction, vanadium(V) oxide acts as a positive catalyst by speeding up the rate of the reaction.

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Complete question:

Sulfur dioxide gas can react in the presence of oxygen and vanadium(V) oxide to form sulfur trioxide. Sulfur trioxide is the only product of the reaction. Which statement correctly describes this reaction?

1) Sulfur dioxide is a catalyst

2) Sulfur trioxide is a catalyst

3) Oxygen is a catalyst

4) Vanadium (V) oxide is a catalyst

The correct Greek letter used for the carbon adjacent to carboxyl group is alpha (α).

What is carboxylic acid?

Any of a group of organic compounds known as carboxylic acids in which a carbon (C) atom forms a double bond with an oxygen (O) atom and a single bond with a hydroxyl group (OH). The carbon atom is connected to a hydrogen (H) atom or another univalent combining group by a fourth bond. The carbonyl group (C=O) and hydroxyl group are what give the carboxyl (COOH) group its name. The acidity of the carboxylic acids is one‘s primary chemical characteristic. They are typically weaker than the well-known mineral acids but generally more acidic than other organic compounds with hydroxyl groups (e.g., hydrochloric acid, HCl, sulfuric acid, H2SO4, etc.).

Greek letter used for the carbon adjacent to the carboxyl group is Alpha.

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